How do neon testers work

How does a neon tester work?

I've seen the other answer on the internet.

Many people say that the glow of neon light on the tester is due to a stray capacitor formed by our body and floor. I'm fine with this until I found out the tester works on DC too. Since I am confused there, I think the capacitor is not working but the tester is glowing in both poles. Please help me understand here. If it is due to a stray capacitor, then how does it work in DC?


TYPICAL "NEON TESTER":

The tested voltage is contacted with the knife tip.
The finger is placed on the metal cap.
Circuit is Voltage_in - tip_resistor - neon - YOU.
Neon lights when voltage is present.

Russell McMahon

Did you see it work with DC itself? Which voltage DC? High-voltage direct current works when there is sufficient earth fault from person to earth.

Russell McMahon

That question had three votes to close just because it looked bad - although it's an excellent question. You must start sentences with a capital letter !!! - If you don't, people will treat you badly. So life is. | You must capitalize "I" if I = you. Do not use text abbreviations such as "plz". Use whole fonts and don't shorten them :-) - If you follow the "rules" above, people may be able to see the excellent technical questions beyond the language and answer them correctly.

Russell McMahon

An excellent question.

High-voltage direct current works when there is sufficient earth fault from person to earth.
If the resistance to ground is around 1 megaohm, it should operate on direct current above the neon stop voltage.
At 10 megaohms it can work.
At over 10M it is uncertain.

Did you see it work with DC itself?
Which voltage DC? What environment - bare feet? Rubber shoes ...?

Spehro Pefhany

+1 There is also 'DC', which is actually a rectified half-wave or full-wave alternating current, which when coupled capacitively behaves similarly to alternating current of smaller magnitude.

cutie pie

Could you write something about AC? In my experience it also depends on shoes / floor material for 240V AC. Perhaps this is a question of where the stray capacitance builds up.